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Chemistry WAEC - 2000

Instruction: Answer all questions correctly.
Questions: 50
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If 20 cm3 of distilled water is added to 80 cm3 of 0.50 mol dm-3 hydrochloric acid, the concentration of the acid will change to

A. 20 mol dm-3
B. 0.40 mol dm-3
C. 2.00 mol dm-3
D. 5.00 mol dm -3

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